A messy, public brawl over a Google critic’s ouster from a Washington think tank has exposed a fissure in Democratic Party politics. On one side there’s a young and growing faction advocating new antimonopoly laws, and on the other a rival faction struggling to defend itself.

At issue is a decades-long relationship between Democrats and tech companies, with Democratic presidents signing off on deregulation and candidates embracing money and innovations from firms like Google and Facebook. Now, locked out of power and convinced that same coziness with large corporations cost them the presidency, Democrats are talking themselves into breaking with tech giants and becoming an antimonopoly party.

The argument had a breakthrough last week when it was reported that Barry Lynn, a monopoly critic and longtime scholar at the Google-funded New America Foundation, was leaving and taking his 10-person initiative with him.

Lynn, who has been critical of Google, had praised European regulators for hitting the company with a $2.7 billion antitrust fine. The foundation, which has received more than $21 million from Google, removed Lynn’s comments from its website.

“A lot of people see this as a tipping point,” Lynn said of his departure in an interview. “This is something that’s upset people on both sides of the aisle.”